Without counting 2nd/3rd party exclusive and multipats. I can certainly see a good chunk of your list be realized during year 4 and 5 of the Switch lifecycle.
Can't tell you how great this is !
Yes, Yes, YES! I agree with you!
It's easy to forget how many big titles Nintendo could release for the Switch ... so I guess I understand the concern, but there's still so much yet to come out!
And let's not forget: Monolith is probably working on two projects simultaneously. I could honestly see a game of theirs releasing in 2020 and another one in 2021.
Also, small note, I'm pretty sure that Rune Factory 5 was confirmed in a Japanese interview to have a goal of a 2020 release. Probably a small amount of Rune Factory fans on this site but ... yeah ... that's one third party exclusive possibly for 2020.